Defining the Informix database interface – PB Docs 2022

To define a connection through an Informix database interface, you
must create a database profile by supplying values for at least the basic
connection parameters in the Database Profile Setup dialog box for
Informix IN9 or I10. You can then select this profile at any time to
connect to your database in the development environment.

For information on how to define a database profile, see Using database profiles.